Digital TV devices are implemented by several different drivers:
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- A bridge driver that is responsible to talk with the bus where the otherdevices are connected (PCI, USB, SPI), bind to the other drivers andimplement the digital demux logic (either in software or in hardware);
- Frontend drivers that are usually implemented as two separate drivers:
- A tuner driver that implements the logic which commands the part ofthe hardware responsible for tuning into a digital TV transponder orphysical channel. The output of a tuner is usually a baseband orIntermediate Frequency (IF) signal;
- A demodulator driver (a.k.a “demod”) that implements the logic whichcommands the digital TV decoding hardware. The output of a demod isa digital stream, with multiple audio, video and data channels typicallymultiplexed using MPEG Transport Stream [1].
Drivers Dvb-dtv Input Devices Definition
On most hardware, the frontend drivers talk with the bridge driver using anI2C bus.
Drivers Dvb-dtv Input Devices Device
| [1] | Some standards use TCP/IP for multiplexing data, like DVB-H (anabandoned standard, not used anymore) and ATSC version 3.0 currentproposals. Currently, the DVB subsystem doesn’t implement those standards. |